403 Forbidden, Nignx

Hello again:

I am have public a redmine and other aplication with nginx the other
aplication is make in php, the php aplication have a api direccion for
some services, when i put the url of de aplication without the api all
is fine and not hae problem, but when I try to access the application
using the API URL the following error appears:

                        403 Forbidden

this is my nginx configuration for de php aplication.

server {
listen 80;
server_name appphp.nginx.com;
root /var/www/appphp;
index index.php, index.html;
location / {
include /etc/nginx/proxy_opts;
proxy_redirect off;
error_page 404 404.html;
error_page 500 502 503 504 500.html;
access_log /var/log/nginx/appphp.access.log;
error_log /var/log/nginx/appphp.error.log;

     gzip on;
    gzip_min_length 1000;
    gzip_types text/plain text/css application/x-javascript text/xml

application/xml application/xml+rss #text/javascript;
gzip_disable “MSIE [1-6].”;

    charset utf-8;

location ~ “^(.+.php)($|/)” {

       set $script $uri;
       set $path_info "/";

      if ($uri ~ "^(.+\.php)($|/)") {
      set $script $1;

      if ($uri ~ "^(.+\.php)(/.+)") {
      set $script $1;
      set $path_info $2;

      include /etc/nginx/fastcgi_params;

      fastcgi_param SCRIPT_FILENAME appphp.nginx.com$script;
      fastcgi_param SCRIPT_NAME $script;
      fastcgi_param PATH_INFO $path_info;


proxy_opts configurations:

Shared options used by all proxies

proxy_set_header Host $http_host;

Following headers are not used by Redmine but may be useful for

plugins and

other web applications

proxy_set_header X-Real-IP $remote_addr;
proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
proxy_set_header X-Forwarded-Proto $scheme;

Any other options for all proxies here

client_max_body_size 10m;
client_body_buffer_size 128k;

proxy_connect_timeout 90;
proxy_send_timeout 90;
proxy_read_timeout 90;

proxy_buffer_size 4k;
proxy_buffers 4 32k;
proxy_busy_buffers_size 64k;
proxy_temp_file_write_size 64k;